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[v9,01/11] ARC: define ASM_NL and __ALIGN(_STR) outside #ifdef __ASSEMBLY__ guard

Message ID 20230611155100.2553804-2-masahiroy@kernel.org (mailing list archive)
State New, archived
Headers show
Series Unify <linux/export.h> and <asm/export.h>, remove EXPORT_DATA_SYMBOL(), faster TRIM_UNUSED_KSYMS | expand

Commit Message

Masahiro Yamada June 11, 2023, 3:50 p.m. UTC
ASM_NL is useful not only in *.S files but also in .c files for using
inline assembler in C code.

On ARC, however, ASM_NL is evaluated inconsistently. It is expanded to
a backquote (`) in *.S files, but a semicolon (;) in *.c files because
arch/arc/include/asm/linkage.h defines it inside #ifdef __ASSEMBLY__,
so the definition for C code falls back to the default value defined in
include/linux/linkage.h.

If ASM_NL is used in inline assembler in .c files, it will result in
wrong assembly code because a semicolon is not an instruction separator,
but the start of a comment for ARC.

Move ASM_NL (also __ALIGN and __ALIGN_STR) out of the #ifdef.

Fixes: 9df62f054406 ("arch: use ASM_NL instead of ';' for assembler new line character in the macro")
Fixes: 8d92e992a785 ("ARC: define __ALIGN_STR and __ALIGN symbols for ARC")
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
---

Changes in v9:
  - New patch

 arch/arc/include/asm/linkage.h | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)
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Patch

diff --git a/arch/arc/include/asm/linkage.h b/arch/arc/include/asm/linkage.h
index c9434ff3aa4c..8a3fb71e9cfa 100644
--- a/arch/arc/include/asm/linkage.h
+++ b/arch/arc/include/asm/linkage.h
@@ -8,6 +8,10 @@ 
 
 #include <asm/dwarf.h>
 
+#define ASM_NL		 `	/* use '`' to mark new line in macro */
+#define __ALIGN		.align 4
+#define __ALIGN_STR	__stringify(__ALIGN)
+
 #ifdef __ASSEMBLY__
 
 .macro ST2 e, o, off
@@ -28,10 +32,6 @@ 
 #endif
 .endm
 
-#define ASM_NL		 `	/* use '`' to mark new line in macro */
-#define __ALIGN		.align 4
-#define __ALIGN_STR	__stringify(__ALIGN)
-
 /* annotation for data we want in DCCM - if enabled in .config */
 .macro ARCFP_DATA nm
 #ifdef CONFIG_ARC_HAS_DCCM